Version：1013070903

Instruction Manual of JTY-GD-F321 Spot-type Photoelectric

Smoke Detector

I. General

JTY-GD-F321 Spot-type photoelectric smoke detector (Detector hereunder) is a two-wire switch-type smoke-sensing detector. As a non-polar two-wire connection is adopted in the detector, it is compatible in conventional switch-type alarm control systems and monitoring alarm systems. The connection can also be connected with automatic fire alarm control systems via the interface module. The detector monitors smoke concentration in the workplace in real time. While monitoring, the red indicator blinks and the working current is low. When the work site smoke concentration has exceeded the preset alarm threshold, the alarm detectors and the red indicator remain on, while the loop current is increased. The detector’s alarm signal can be locked and is displayed by changes in the loop current. The alarm can only be reset by the instant power disconnection.

The detector is applicable in places where fire might generate volume smoke, i.e. in industrial and civil buildings such as in the restaurant, hotel, teaching building, office building, computer room, archives and stack room.

II. Features and technical parameters

1. Working voltage: DC24V (allowance: DC18V ~ 30V) 2. Working current: during monitoring ＜50µA @ DC 24V

In alarm mode 1mA~10mA (depends on the loop current limiting resistance)

3. Working indicator: during monitoring, the red indicator blinks once per 3~ 6s

In alarm mode: the red indicator remains on

4. Environment: temperature: -10℃~55℃

Relative humidity:≤95% (40℃±2℃ noncondensing)

5. Exterior size: as shown in figure 1, Ø100mm×46mm (its height with the seat is 50mm after installation) 6. Weight: 100g

7. Standard: GB4715-2005

8. Distance from floor: ≤12m

9. Areas covered: see the provisions in the GB50116-98 Fig. 1 Code for Design of Automatic Fire Alarm System.

III. Installation and commissioning

Determine the location, mounting distance and numbers for mounting the detectors in the protection area in accordance to the relevant stipulations of GB50116-98.

A DZ-F101 seat shown in figure 2 is required for mounting the detector; its exterior size is Ø100mm×17mm, diameter of the fixing hole is 4.5mm and the distance between the holes is 56mm~64mm.

A non-polar two-wire system is used to connect the detector with the controller, and terminal 3 and terminal 1 shall be used (or terminal 2 and terminal 1, since terminal 2 and terminal 3 are connected directly inside the detector). When you connect the detector with the door lamp, the negative terminal of the door lamp shall be connected with terminal 4 on the seat while the positive terminal of the door lamp is connected with the +5V output of the controlling power supply.

For connecting multiple detectors, see figure 3. From the connection at this level we can find the failures caused by the connection loop open or caused by dismounting the detector. The terminal resistance depends on the controller; for details see instructions attached with the controller.

Input port 1

for controller

Input port 2

for controller

Fig. 3 Fig. 2

1

Terminal load